Hi there   What sorts of limits or boundaries do you wish to teach?  Are you talking about physical boundaries to prevent sexual assault or...more psychological boundaries?  And what age group of kids?   I found one site which describes drawing circles to differentiate the boundaries of different relationships.  Just follow this link.   When I was involved with leading group therapy sessions we did things like...describing a problem and asking the group members..."Who owns this problem?"  The goal was to show that some problems are not our responsibility but some are...and how to tell the difference.    You will have to tell us what you come up with.  Use your creativity here...I bet you will come up with something great.   Thank you for your question.